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Finding the Fourth Proportional to 911,812.83, 1,258,305.63 and 498,357.94

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Solution

The fourth proportional to 911,812.83, 1,258,305.63 and 498,357.94 is: 687,736.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,812.83 : 1,258,305.63 = 498,357.94 : x
  2. Step 2: Convert to fraction form
    911,812.83/1,258,305.63 = 498,357.94/x
  3. Step 3: Cross multiply
    911,812.83x = 1,258,305.63 × 498,357.94
  4. Step 4: Simplify right side
    911,812.83x = 627,086,601,657.20
  5. Step 5: Solve for x
    x = 627,086,601,657.20/911,812.83
  6. Step 6: Final answer
    x = 687,736.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.